Dividing-plate for block-molds.



No. 050.200. PATBNTED A121010. 1907.

P. A. 00000:.` 010101100 PLATE F00 BLocK Moms.

APPLIOATIDK FIL1TD-AUG. 20, 1906.

'UNITE I) STATES' -YFRANK A. BORST, OF SOUTH BEND,

PATENT OFFICE.

INDIANA, ASSIGNOR TO IDEAL CON- RATION OF INDIANA.

DIVIDING-FLATE FOR BLOCK-MOLDS.

Specification o Letters Patent.

Patented April 16, 1907.

Application filed August 20,1906. Serial No. 331,248.

.T (if/ZZ 1071/0717/ if; nco/,l/ concern,.-

Be it known that I, FRANK A. BonsT, a citizen of the United States, and a resident of South Bend, in the county of St. Joseph and State o'l' Indiana, have invented a new and Improved Dividing-Plate for Block- Molds, of which the following is a specification.

My invention relates to molds for the forming of building-blocks of plastic material; and the objects of my improvements are to provide means whereby a plurality of blocks can be molded in the same machine simultaneously and to provide means whereby the edges of the molded blocks are prevented. from breaking when the dividingplates are withdrawn;

My invention consists in a mold arranged lfor the rigid retention of thin dividing-plates and a removable guide through which these plates are withdrawn.

In the drawings, Figure 1 is a plan view of a block-molding machine with the guide placed over a dividing-plate. Fig. 2 is a crossseetion on the line 2 2 of Fig. 1. Fig. 3 is a front view of the opened machine. Fig. 4 is a perspective view of a portion of the mold on a somewhat larger scale, showing a dividing-plate and the guide in position. Fig. 5 is a perspective view of the face-plate.

Similar reference characters refer to like parts throughout the several views.

In the drawings, 1 are the legs and 2 the top of the frame of a concrete-block machine. To the rear of the frame is secured the back plate 3, provided with a flange 4. The front plate 5, having a flange 6, is hinged to the frame at 7 and when swung forward to discharging position rests on the arm 8, extending forward from the frame. This front plate has arms or horns 9 formed on it, which arms are adapted when the mold is open to support the end doors or plates 10, which are hinged to the front plate 5 at V11. A face-plate 12, normally resting on the frame, is mounted on the pins 13, secured to the front plate, and a pallet 14 rests against the front plate and on the face-plate.

Tthe mold is locked together by means ofthe cams 15, pivoted on the lugs 16 on the end plates,"which cams engage back of the back plate, as shown in Fig. 1.

When the block has been molded, the camhandles 17 are raised and the l-aont plate swung down to horizontal position, as shown in Fig. 3, together with the pallet 14. The

by means of the pins 125, and the end plates aj-c pez'n'iitted to swing down to the position shown in Fig. 3, wheiie they :lest on the arms 9. The pallet, and with it the molded. block, is now carried away and a new pallet substituted and. the mold again closed.

It is oi'ten desirable to mold blocks of less length than the interior ol the mold, for which purpose the means described below are employed.

The face-plate 12 is provided with slots .1S to receive the lower edge of the dividingfront and back plates, respectively, are provided with slots 20 to receive the eaifs 21 of said plates. By these slots the plates may be rigidly held while the plastic material is being rammed in the mold, and the position and numbei:l of the slots determine the number of diiieient sizes oll blocks that can be molded on one machine.

When the compartments of the mold are filled., the guide-bar 22 is placed over each plate in tui-n, the hooks 23 on the bai= engaging under the flange 4 of the back plate and the dividing-plate 19 passing up through the longitudinal slot 24.

The plastic material has a slight tendency to stick to the di.vi ,ii.ng-plate, -and as a -result the upper edges of the blocks tend to break or crumble when the dividing-plate is withdrawn; but by placing the guide -bar 22 over the plate with the hooks 23 under the `flange 4 and by pressing down on the handle 25 while the plate 19 is withdrawn the bar resting dif'fectly on the blocks adjacent to the plate will prevent all cnmbling andbfeaking. The blocks will be discl'iafged from the mold with sound sharp ed ges in the manner above described and carriedl away on the pallet 14.

y Having now explained my improvements, what I claim as my invention, and desire to secure by Letters Patent, is-

1. In a building-block mold, the combination of a 'ame, a back plate having notches at its upper edge, a front plate hinged. to said frame and normally parallel to the back plates 19 while the flanges 4 and 6 of the.

bottom plate is carried up to veizv tical position IOO plate, saidl lyon1; plato also provided with not/chos al; its uppo odgo, ond. platos, a bottom plato (extending aoaoss said mold and oonnootod to said 'front plato and provided with gfooves, and. adividing-'plato adapted to [it in said groove and provided with extensions to engage tho 'notohos in tho hout and back platos.

2. In a l.)uilding-hlook mold, the, combination of' a bottom and sidos, on@ ol the sidos having a latoiial head or flange along its upper edge, a dividing-'plato adapted o loe sosurely hold m said mold. to parmi@ tho 'lonning of a pluzfality of blocks simultaneously, and a guido oo111|^ rising a bar having' aslot through which said plato may pass and. 'pi vided with a hook to engage tho head o1 .Ilango ol' tho sido of the mold.

ln testimony whoiiioo'l l. have signed this spoofcatio'n. in the presence of two subscribing' Witnesses.

FRANK A. BURST.

'Vvituesses z G. B. Il'oPKiNs, S. Aimmfl. 

